6 Suggested Answers

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Remember that when you THINK the AC's off,it's really not.Almost all cars have the AC compressor actuate every time you set the dial to `defrost' or `mix' positions. On a TAURUS there are only two positions(maybe three)which DON'T kick the AC on.On some cars,that's the 11 o'clock and 2 o'clock positions on the selector.

SO...........the odds are that the compressor magnetic clutch or wiring to it has shorted.Because you really have power going there even when you think you don't. (:^) don-ohio

You have a shorted wire in the system. Try this, disconnect the fuel injection connectors to the engine one at a time and see if the short goes away, then look at the wiring in that connector and try and locate the shorted wire.

I would disconnect the computer and put a new fuse in and see if it blows again. if it does not blow then the short is in the computer if it does blow the fuse with computer disconnected then the short is in the harness let me know what happens

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that could be a tricky situation because you don't know if it's the pcm itself or a circuit that it controls. first you must know whether or not it is a short in the power or ground supplies to the pcm, then if that is all ok, you have to disconnect all sensors, injectors, etc, everything that it controls and see if it blows a fuse. if it doesn't, then you have to hook them back up one by one and see which one will blow the fuse.

There are two PCM 10amp fuses that power the computer. The computer provides grounds to some 20 or 30 different circuits. Any one of those circuits could blow one or both of the 10amp fuses.I would probably unplug the PCM and see if the fuses still blow. If not, you will need to pin test each circuit from the PCM to find the short. And you'll need a shop manual to get the wiring diagrams for those circuits.